Jacobson Radical Theory

  • T. Y. Lam
Part of the Problem Books in Mathematics book series (PBM)


The Jacobson radical of a ring R, denoted by rad R, is the intersection of the maximal left ideals of R. This notion is left-right symmetric; in particular, rad R is an ideal of R. A good way to understand rad R is to think of it as the ideal of elements annihilating all left (resp. right) simple R-modules. The Jacobson radical is also closely tied in with U(R), the group of units of R. In fact, rad R is the largest ideal R such that 1 + RU(R).


Prime Ideal Maximal Ideal Direct Summand Left Ideal Group Ring 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • T. Y. Lam
    • 1
  1. 1.Department of Mathematics MA-01University of CaliforniaBerkeleyUSA

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